intel/isl: move get_tile dims/masks to common isl header

Both classic and iris have the same code for this, but none of it
is dependent on drivers, so just add inline helpers to isl.

Acked-by: Tapani Pälli <tapani.palli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8253>

src/intel/isl/isl.h

@@ -2396,6 +2396,48 @@ isl_memcpy_tiled_to_linear(uint32_t xt1, uint32_t xt2,
                            enum isl_tiling tiling,
                            isl_memcpy_type copy_type);
 
+/**
+ * @brief computes the tile_w (in bytes) and tile_h (in rows) of
+ * different tiling patterns.
+ */
+static inline void
+isl_get_tile_dims(enum isl_tiling tiling, uint32_t cpp,
+                  uint32_t *tile_w, uint32_t *tile_h)
+{
+   switch (tiling) {
+   case ISL_TILING_X:
+      *tile_w = 512;
+      *tile_h = 8;
+      break;
+   case ISL_TILING_Y0:
+      *tile_w = 128;
+      *tile_h = 32;
+      break;
+   case ISL_TILING_LINEAR:
+      *tile_w = cpp;
+      *tile_h = 1;
+      break;
+   default:
+      unreachable("not reached");
+   }
+}
+
+/**
+ * @brief Computes masks that may be used to select the bits of the X
+ * and Y coordinates that indicate the offset within a tile.  If the BO is
+ * untiled, the masks are set to 0.
+ */
+static inline void
+isl_get_tile_masks(enum isl_tiling tiling, uint32_t cpp,
+                   uint32_t *mask_x, uint32_t *mask_y)
+{
+   uint32_t tile_w_bytes, tile_h;
+
+   isl_get_tile_dims(tiling, cpp, &tile_w_bytes, &tile_h);
+
+   *mask_x = tile_w_bytes / cpp - 1;
+   *mask_y = tile_h - 1;
+}
 #ifdef __cplusplus
 }
 #endif